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Magnetar funds trim CoreWeave (CRWV) stake with 2.15M-share open-market sale

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

CoreWeave, Inc. reported that investment entities associated with Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC and David J. Snyderman filed a Form 4 for indirect open-market sales of Class A Common Stock on August 12, 2026. Across 24 transactions, these entities sold a total of 2,147,871 shares of CoreWeave Class A Common Stock at weighted average prices of $107.64 and $108.16 per share, within price ranges from $107.00 to $108.64. The shares were held by various Magnetar-managed funds, and each Magnetar entity and Mr. Snyderman disclaim beneficial ownership beyond their respective pecuniary interests.

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Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.
Role 10% Owner | 10% Owner | 10% Owner | 10% Owner
Sold 2,147,871 shs ($231.60M)
Type Security Shares Price Value
Sale Class A Common Stock F1, F3, F4, F5, F6 107,538 $107.64 $11.58M
Sale Class A Common Stock F2, F3, F4, F5, F6 61,199 $108.16 $6.62M
Sale Class A Common Stock F1, F3, F4, F5, F7 367,433 $107.64 $39.55M
Sale Class A Common Stock F2, F3, F4, F5, F7 209,134 $108.16 $22.62M
Sale Class A Common Stock F1, F3, F4, F5, F8 184,794 $107.64 $19.89M
Sale Class A Common Stock F2, F3, F4, F5, F8 105,180 $108.16 $11.38M
Sale Class A Common Stock F1, F3, F4, F5, F9 50,906 $107.64 $5.48M
Sale Class A Common Stock F2, F3, F4, F5, F9 28,986 $108.16 $3.14M
Sale Class A Common Stock F1, F3, F4, F5, F10 4,979 $107.64 $536K
Sale Class A Common Stock F2, F3, F4, F5, F10 2,834 $108.16 $307K
Sale Class A Common Stock F1, F3, F4, F5, F11 107,386 $107.64 $11.56M
Sale Class A Common Stock F2, F3, F4, F5, F11 61,114 $108.16 $6.61M
Sale Class A Common Stock F1, F3, F4, F5, F12 147,418 $107.64 $15.87M
Sale Class A Common Stock F2, F3, F4, F5, F12 83,914 $108.16 $9.08M
Sale Class A Common Stock F1, F3, F4, F5, F13 44,878 $107.64 $4.83M
Sale Class A Common Stock F2, F3, F4, F5, F13 25,541 $108.16 $2.76M
Sale Class A Common Stock F1, F3, F4, F5, F14 157,192 $107.64 $16.92M
Sale Class A Common Stock F2, F3, F4, F5, F14 89,470 $108.16 $9.68M
Sale Class A Common Stock F1, F3, F4, F5, F15 101,877 $107.64 $10.97M
Sale Class A Common Stock F2, F3, F4, F5, F15 57,980 $108.16 $6.27M
Sale Class A Common Stock F1, F3, F4, F5, F16 78,040 $107.64 $8.40M
Sale Class A Common Stock F2, F3, F4, F5, F16 44,421 $108.16 $4.80M
Sale Class A Common Stock F1, F3, F4, F5, F17 16,352 $107.64 $1.76M
Sale Class A Common Stock F2, F3, F4, F5, F17 9,305 $108.16 $1.01M
holding Class A Common Stock F3, F4, F5, F18 -- -- --
Holdings After Transaction: Class A Common Stock — 7,257,988 shares (Indirect, Footnotes)
Footnotes (18)
  1. F1. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $107.00 to $107.90, inclusive. The reporting person undertakes to provide to CoreWeave, Inc. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote and in footnote 2.
  2. F2. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $108.00 to $108.64, inclusive.
  3. F3. Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of CW Opportunity 2 LP, CW Opportunity LLC, Longhorn Special Opportunities Fund LP, Magnetar Capital Master Fund, Ltd, Magnetar Constellation Master Fund, Ltd, Magnetar Longhorn Fund LP, Magnetar SC Fund Ltd, Magnetar Xing He Master Fund Ltd, Purpose Alternative Credit Fund - F LLC, and Purpose Alternative Credit Fund - T LLC, the general partner of Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund (They are not separate legal entities) and the manager of Magnetar Alpha Star Fund LLC and Magnetar Lake Credit Fund LLC (collectively, the "Magnetar Funds").
  4. F4. Magnetar Capital Partners LP ("Magnetar Capital Partners") is the sole member and parent holding company of Magnetar Financial. Supernova Management LLC ("Supernova Management") is the general partner of Magnetar Capital Partners. The administrative manager of Supernova Management is David J. Snyderman, a citizen of the United States of America.
  5. F5. Each of the Magnetar Funds, Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman disclaims beneficial ownership of these shares of Common Stock of the Issuer, except to the extent of its or his pecuniary interest therein.
  6. F6. These securities are held directly by CW Opportunity 2 LP.
  7. F7. These securities are held directly by CW Opportunity LLC.
  8. F8. These securities are held directly by Longhorn Special Opportunities Fund LP.
  9. F9. These securities are held directly by Magnetar Alpha Star Fund LLC.
  10. F10. These securities are held directly by Magnetar Capital Master Fund, Ltd.
  11. F11. These securities are held directly by Magnetar Constellation Master Fund, Ltd.
  12. F12. These securities are held directly by Magnetar Lake Credit Fund LLC.
  13. F13. These securities are held directly by Magnetar SC Fund Ltd.
  14. F14. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
  15. F15. These securities are held directly by Magnetar Xing He Master Fund Ltd.
  16. F16. These securities are held directly by Purpose Alternative Credit Fund - F LLC.
  17. F17. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
  18. F18. These securities are held directly by Magnetar Longhorn Fund LP.
Total shares sold 2,147,871 shares Aggregate non-derivative Class A Common Stock sales on August 12, 2026
Weighted average sale price (block 1) $107.64 per share Sales executed within $107.00–$107.90 price range
Weighted average sale price (block 2) $108.16 per share Sales executed within $108.00–$108.64 price range
Number of sale transactions 24 Count of non-derivative sales of Class A Common Stock reported
Transaction date August 12, 2026 All reported non-derivative sales occurred on this date
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
beneficial ownership financial
"disclaims beneficial ownership of these shares of Common Stock of the Issuer"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"except to the extent of its or his pecuniary interest therein."
indirect ownership financial
"direct_or_indirect": "I","nature_of_ownership": "Footnotes""
investment adviser financial
"Magnetar Financial LLC serves as the investment adviser to each of"
An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.

FAQ

What insider activity did Magnetar entities report for CoreWeave (CRWV)?
Magnetar-associated entities reported indirect open-market sales of CoreWeave Class A Common Stock on August 12, 2026. They executed 24 transactions totaling 2,147,871 shares, with prices in the $107.00–$108.64 range, through multiple Magnetar-managed funds.

How many CoreWeave (CRWV) shares were sold in the latest Magnetar Form 4?
The filing shows that Magnetar-associated funds sold 2,147,871 shares of CoreWeave Class A Common Stock. These shares were disposed of indirectly across 24 separate transactions, all dated August 12, 2026, according to the reported transaction summary.

Were the CoreWeave (CRWV) sales by Magnetar reported as direct or indirect holdings?
All reported sales involved indirect ownership interests held through various Magnetar-managed funds. The filing notes that Magnetar entities and David J. Snyderman disclaim beneficial ownership of the CoreWeave shares except to the extent of their pecuniary interests.

Did the Magnetar CoreWeave (CRWV) Form 4 involve any derivative securities?
No derivative transactions were reported. The filing lists only non-derivative sales of Class A Common Stock, and the derivative position summary shows zero derivative transactions and no derivative holdings reported in this Form 4.

Which Magnetar funds were involved in the CoreWeave (CRWV) share sales?
Footnotes attribute the sold shares to multiple vehicles, including CW Opportunity 2 LP, CW Opportunity LLC, Longhorn Special Opportunities Fund LP, several Magnetar master funds, Magnetar Lake Credit Fund LLC, and Purpose Alternative Credit Fund entities, among others managed or advised by Magnetar.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Magnetar Financial LLC
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
CoreWeave, Inc. [ CRWV ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/12/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class A Common Stock08/12/2026S107,538D$107.64(1)3,975,372IFootnotes(3)(4)(5)(6)
Class A Common Stock08/12/2026S61,199D$108.16(2)3,914,173IFootnotes(3)(4)(5)(6)
Class A Common Stock08/12/2026S367,433D$107.64(1)17,208,727IFootnotes(3)(4)(5)(7)
Class A Common Stock08/12/2026S209,134D$108.16(2)16,999,593IFootnotes(3)(4)(5)(7)
Class A Common Stock08/12/2026S184,794D$107.64(1)1,788,988IFootnotes(3)(4)(5)(8)
Class A Common Stock08/12/2026S105,180D$108.16(2)1,683,808IFootnotes(3)(4)(5)(8)
Class A Common Stock08/12/2026S50,906D$107.64(1)961,967IFootnotes(3)(4)(5)(9)
Class A Common Stock08/12/2026S28,986D$108.16(2)932,981IFootnotes(3)(4)(5)(9)
Class A Common Stock08/12/2026S4,979D$107.64(1)233,215IFootnotes(3)(4)(5)(10)
Class A Common Stock08/12/2026S2,834D$108.16(2)230,381IFootnotes(3)(4)(5)(10)
Class A Common Stock08/12/2026S107,386D$107.64(1)3,571,844IFootnotes(3)(4)(5)(11)
Class A Common Stock08/12/2026S61,114D$108.16(2)3,510,730IFootnotes(3)(4)(5)(11)
Class A Common Stock08/12/2026S147,418D$107.64(1)4,354,193IFootnotes(3)(4)(5)(12)
Class A Common Stock08/12/2026S83,914D$108.16(2)4,270,279IFootnotes(3)(4)(5)(12)
Class A Common Stock08/12/2026S44,878D$107.64(1)794,289IFootnotes(3)(4)(5)(13)
Class A Common Stock08/12/2026S25,541D$108.16(2)768,748IFootnotes(3)(4)(5)(13)
Class A Common Stock08/12/2026S157,192D$107.64(1)6,633,456IFootnotes(3)(4)(5)(14)
Class A Common Stock08/12/2026S89,470D$108.16(2)6,543,986IFootnotes(3)(4)(5)(14)
Class A Common Stock08/12/2026S101,877D$107.64(1)1,949,966IFootnotes(3)(4)(5)(15)
Class A Common Stock08/12/2026S57,980D$108.16(2)1,891,986IFootnotes(3)(4)(5)(15)
Class A Common Stock08/12/2026S78,040D$107.64(1)1,954,824IFootnotes(3)(4)(5)(16)
Class A Common Stock08/12/2026S44,421D$108.16(2)1,910,403IFootnotes(3)(4)(5)(16)
Class A Common Stock08/12/2026S16,352D$107.64(1)644,347IFootnotes(3)(4)(5)(17)
Class A Common Stock08/12/2026S9,305D$108.16(2)635,042IFootnotes(3)(4)(5)(17)
Class A Common Stock6,622,946IFootnotes(3)(4)(5)(18)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
1. Name and Address of Reporting Person*
Magnetar Financial LLC
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Magnetar Capital Partners LP
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Supernova Management LLC
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Snyderman David J.
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
Explanation of Responses:
1. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $107.00 to $107.90, inclusive. The reporting person undertakes to provide to CoreWeave, Inc. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote and in footnote 2.
2. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $108.00 to $108.64, inclusive.
3. Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of CW Opportunity 2 LP, CW Opportunity LLC, Longhorn Special Opportunities Fund LP, Magnetar Capital Master Fund, Ltd, Magnetar Constellation Master Fund, Ltd, Magnetar Longhorn Fund LP, Magnetar SC Fund Ltd, Magnetar Xing He Master Fund Ltd, Purpose Alternative Credit Fund - F LLC, and Purpose Alternative Credit Fund - T LLC, the general partner of Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund (They are not separate legal entities) and the manager of Magnetar Alpha Star Fund LLC and Magnetar Lake Credit Fund LLC (collectively, the "Magnetar Funds").
4. Magnetar Capital Partners LP ("Magnetar Capital Partners") is the sole member and parent holding company of Magnetar Financial. Supernova Management LLC ("Supernova Management") is the general partner of Magnetar Capital Partners. The administrative manager of Supernova Management is David J. Snyderman, a citizen of the United States of America.
5. Each of the Magnetar Funds, Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman disclaims beneficial ownership of these shares of Common Stock of the Issuer, except to the extent of its or his pecuniary interest therein.
6. These securities are held directly by CW Opportunity 2 LP.
7. These securities are held directly by CW Opportunity LLC.
8. These securities are held directly by Longhorn Special Opportunities Fund LP.
9. These securities are held directly by Magnetar Alpha Star Fund LLC.
10. These securities are held directly by Magnetar Capital Master Fund, Ltd.
11. These securities are held directly by Magnetar Constellation Master Fund, Ltd.
12. These securities are held directly by Magnetar Lake Credit Fund LLC.
13. These securities are held directly by Magnetar SC Fund Ltd.
14. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
15. These securities are held directly by Magnetar Xing He Master Fund Ltd.
16. These securities are held directly by Purpose Alternative Credit Fund - F LLC.
17. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
18. These securities are held directly by Magnetar Longhorn Fund LP.
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC, which is the General Partner of Magnetar Capital Partners LP, which is in turn the Sole Member of Magnetar Financial LLC08/14/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC, which is the General Partner of Magnetar Capital Partners LP08/14/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC08/14/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman08/14/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR